rem bat: arguments https://www.cnblogs.com/lihao007/p/10745872.html
rem %0, %1, ...   : regular reference
rem %~0, %~1, ... : removing double-quotations.

javac -encoding UTF-8 FileEncryption.java

for /l %%i in (1,1,%~2) do java FileEncryption en key.png %~1
